Brett248Vista 5 Posted April 1, 2014 Report Share Posted April 1, 2014 Trust me I was ready to pounce.. We had some winds as well.. I kept watching closely! You are right, the action feels so much better with the SAS lower, the rounds feed smoothly. Can't wait to get out and put it to the real test. (I haven't had a chance to shoot it since doing any of the mods including the Trij RX30). Quote Link to post Share on other sites
SHOTGUN MESIAH 855 Posted April 1, 2014 Author Report Share Posted April 1, 2014 Them shells glide in and out slicker than goose shit through a tin funnel. Quote Link to post Share on other sites
Brett248Vista 5 Posted April 1, 2014 Report Share Posted April 1, 2014 I've never funneled goose shit, so I will just have to rely on your word! Quote Link to post Share on other sites
Cajundefense 3 Posted April 1, 2014 Report Share Posted April 1, 2014 Okay here goes another one! Quote Link to post Share on other sites
gunman1 1,753 Posted April 2, 2014 Report Share Posted April 2, 2014 ^^^I love that avatar 1 Quote Link to post Share on other sites
Brett248Vista 5 Posted April 2, 2014 Report Share Posted April 2, 2014 Looking GOOD Cajun! Quote Link to post Share on other sites
steveUK 9 Posted April 2, 2014 Report Share Posted April 2, 2014 Looks awesome Cajun Quote Link to post Share on other sites
tshong 0 Posted April 4, 2014 Report Share Posted April 4, 2014 Can anyone comment if the MKA's disassembly process got easier (or harder) because the stock adapter is a separate piece?? How do you access the screw that separates the upper and lower receiver? Quote Link to post Share on other sites
tshong 0 Posted April 4, 2014 Report Share Posted April 4, 2014 NM just saw the assembly video on page 4 on this thread. Looks like more or less the same effort to separate the upper and lower. That's too bad. Was hoping this lower receiver would incorporate the feed ramp lever from the BR99 design. That would allow you to remove barrel and bolt for cleaning without separating the receivers. Quote Link to post Share on other sites
rapidrpr 3 Posted April 4, 2014 Report Share Posted April 4, 2014 tshong--do you own a mka1919 or a br99 ? Quote Link to post Share on other sites
yamadog35 28 Posted April 4, 2014 Report Share Posted April 4, 2014 (edited) The only complaint was that the brownells spring was a bit "soft". I like a very sharp snap into safe and fire. I had another spring laying around so I switched it out and now it snaps. Hey folks. I've never owned an AR so I don't know about these springs. Are there different "grades" you can buy (stiffer vs softer)? What should I look for if I want that crisper feel you describe? I'm finally going to get a break from work this weekend to assemble my new lower to my MKA. I'll just use the supplied spring for now. Edited April 4, 2014 by yamadog35 Quote Link to post Share on other sites
Brett248Vista 5 Posted April 4, 2014 Report Share Posted April 4, 2014 Yamadog, Wish I knew how to give you an answer to this question. My Del-Ton Echo 316 has a "crisp" safety selector, my S&W 15-22 has an upgraded Battle Arms Ambi Safety and it's crisp as well. The brownells spring seems a bit soft to me. I used the original spring out of my 15-22 to replace the brownells spring and now it clicks firmly. Quote Link to post Share on other sites
yamadog35 28 Posted April 4, 2014 Report Share Posted April 4, 2014 So I guess maybe just buy a few from different places and one may be stiffer than another . . . They're cheap enough so that won't hurt too bad. Thanks! I just got the old parts stripped out of my poly lower. I should have the new lower together tomorrow morning. Hoping to get it to the range Sunday or Monday. Quote Link to post Share on other sites
SHOTGUN MESIAH 855 Posted April 5, 2014 Author Report Share Posted April 5, 2014 Cant you just stretch out the spring ? Quote Link to post Share on other sites
Brett248Vista 5 Posted April 5, 2014 Report Share Posted April 5, 2014 Stretching a spring does not change the spring rate (how stiff the spring is) and will just ultimately fatigue the spring and cause it to fail. If you want a spring with more tension, you need to buy a spring that is wound with thicker steel, has more loops or different material properties. Quote Link to post Share on other sites
james lambert 3,059 Posted April 6, 2014 Report Share Posted April 6, 2014 Stretching a spring does not change the spring rate (how stiff the spring is) and will just ultimately fatigue the spring and cause it to fail. If you want a spring with more tension, you need to buy a spring that is wound with thicker steel, has more loops or different material properties. Less coils = higher spring rate More coils =lower spring rate Get it right if you are going to give advice Jim Quote Link to post Share on other sites
Brett248Vista 5 Posted April 6, 2014 Report Share Posted April 6, 2014 Thanks for the correction Jim, but the number of coils alone only have an impact if the material is exactly the same. There are numerous other things that have an impact on the rate as I mentioned. But you are correct, the number of coils certainly will change the rate given the same exact material. Quote Link to post Share on other sites
yamadog35 28 Posted April 7, 2014 Report Share Posted April 7, 2014 (edited) Finally got a little time to assemble my lower today. Everything went together pretty will except for the magazine catch "bar". I found mine was not consistent thickness so it did not want to slide into the slot in the lower. I had to carefully file off some high spots and attempt to get the sides parallel. After a bit of tweaking it now operates as it should. I was already using the T&N trigger group so that is what went into my lower. No problems there. As others have noted, the safety operation is a bit mushy. I will try a different spring and hopefully it will get a bit more crisp. Overall fit and finish is good. I'm hoping to get to the range Thursday or Friday this week to try it out. Edited April 7, 2014 by yamadog35 Quote Link to post Share on other sites
Brett248Vista 5 Posted April 7, 2014 Report Share Posted April 7, 2014 Looks great Yama! I see I was not the only one with a horribly shaped mag catch bar.. I suggested to SAS they make a nice steel billet Mag Catch setup (maybe ambi?) and a whole new Fire Control Group would be nice as well! Yeah that Brownells AR spring is really soft.... It's not a dimensional issue either, the safety detent hole is the same depth and location as a standard AR, I just think Brownells has a bad batch of springs. Quote Link to post Share on other sites
rapidrpr 3 Posted April 7, 2014 Report Share Posted April 7, 2014 I took the the safety spring out my ar and put it in the mka1919.put the brownell ar spring into the ar. the mka 1919 safety was crisper, the ar was the same. Quote Link to post Share on other sites
timmmyy 9 Posted April 9, 2014 Report Share Posted April 9, 2014 yamadog35 gun looks nice Quote Link to post Share on other sites
rapidrpr 3 Posted April 10, 2014 Report Share Posted April 10, 2014 sas lower has been out for two weeks. two firebird lowers are now for sale. I wonder maybe? Quote Link to post Share on other sites
Starquestjoe 3 Posted August 16, 2014 Report Share Posted August 16, 2014 Its about time to get some finished pictures up of my mka. I have shot it since april 8 due to bein burned of 40% of my body. Mainly the right side. Im recovering very well but have a long way to go. But when I did shot the mka with the sas lower it felt great and shot flawless. Not one feed or eject problem. Gun ran really smooth. Im all most up to strength again to shot. When I go home from the hospital I couldnt hold the gun up, it was to heavy. But anyway on to pics Ok so after typing all this the pics of the mka were on my old phone. So ill have to take some later but for now here is a mosin nagat I just finished building Quote Link to post Share on other sites
yamadog35 28 Posted August 16, 2014 Report Share Posted August 16, 2014 First of all, wow, hope you get all better soon or as much as you can be. Second, that is a nice looking Mosin build. Is that a Center Balanced Systems kit? I've become a bit of a bullpup nut with a Tavor, KSG, and several others. I've thought about doing a CBRPS build at some point. Quote Link to post Share on other sites
Starquestjoe 3 Posted August 17, 2014 Report Share Posted August 17, 2014 Thanks, got a long recovery ahead of me . And yes its the cbrps MNAR kit. I would recommend cbrps to anyone. Great products ive also become a bullpup nut as well. If I can bull pup a mka I would Quote Link to post Share on other sites
Starquestjoe 3 Posted August 29, 2014 Report Share Posted August 29, 2014 Quote Link to post Share on other sites
krystofer66 1 Posted March 19, 2015 Report Share Posted March 19, 2015 Ok ladies and gents. I am new to the forum but have a serious question. I have read most of this thread so i hope i dont start a war with this one. I have owned a XN for over two years now and i think its time to upgrade. I am curious about the main differences of these two lowers. from what i have read it seams like the SAS lower which may or may not be the same lower T&N sells comes in around 350 ready to go. Now the one from FBP is 375 but might also need some added parts internals and stuff to make it work. The kit they sell is 199 is this info correct or are my assumptions wrong. No i think both pieces are fairly priced and extremely good looking products so please dont rip on me or others over this just trying to figure this all out. Quote Link to post Share on other sites
Arndog123 2 Posted March 19, 2015 Report Share Posted March 19, 2015 T&N sells the SAS lower because that's where I got mine. Yes, it's pretty much ready to go but I decided to install their trigger group as well to make my MKA 922R compliant. I don't think you can go wrong with either lower, the SAS lower just looks better IMHO. Quote Link to post Share on other sites
james lambert 3,059 Posted March 19, 2015 Report Share Posted March 19, 2015 all the same parts are required to assemble both lowers Firebird was the first to make lowers and all of the associated internal parts including 922r components Quote Link to post Share on other sites
Brett248Vista 5 Posted March 22, 2015 Report Share Posted March 22, 2015 Hey Jim, Just checked out the new web site, looking GOOD! Nice photos of the Heli Hunter that's a sweet piece of kit! Quote Link to post Share on other sites
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