Joe**Dirt 21 Posted August 3, 2013 Report Share Posted August 3, 2013 What esle will I need to complete the gun? Anything else besides Buffer tube Butt stock Pistol grip Not needed but want to ad Tooth & Nail forearm with charging handle Also is Firebird the only one that makes a reveiver? Quote Link to post Share on other sites
Flatland Shooter 22 Posted August 3, 2013 Report Share Posted August 3, 2013 At this time Firebird Precision is the only one offering an aluminum lower receiver for the MKA 1919. In the box you will also find replacement hammer and trigger pins, a new detent screw for the safety, a GI spec roll pin for the bolt stop and a cap screw that locks the upper to the lower. In addition to the parts you mentioned, you will need the screw that holds on the pistol grip, the bolt stop and spring, the magazine latch and spring, the fire control group (trigger, disconnector, safety and hammer and springs) either from your polymer lower or from an aftermarket source. The hole in the bolt stop will need to be slightly enlarged (#37 drill bit) and the upper receiver may need to be "notched" to allow the bolt hold open to work. In my case (I used all FP parts) the hammer was a little too wide for the new lower and had to be fitted. Bill Quote Link to post Share on other sites
Joe**Dirt 21 Posted August 3, 2013 Author Report Share Posted August 3, 2013 Thanks for the response. Besides the bolt for the grip do the rest of the mentioned parts come from my old lower? Quote Link to post Share on other sites
Flatland Shooter 22 Posted August 4, 2013 Report Share Posted August 4, 2013 Thanks for the response. Besides the bolt for the grip do the rest of the mentioned parts come from my old lower? You can use the parts from your polymer lower but changing out these parts (hammer, disconnector & trigger) will result in three part towards 922 compliance and a far better trigger pull. Quote Link to post Share on other sites
Joe**Dirt 21 Posted August 4, 2013 Author Report Share Posted August 4, 2013 Thanks for the response. Besides the bolt for the grip do the rest of the mentioned parts come from my old lower? You can use the parts from your polymer lower but changing out these parts (hammer, disconnector & trigger) will result in three part towards 922 compliance and a far better trigger pull. Thanks! After some more research these are the parts I'm going to be changing. receiver gas piston trigger hammer diconnector butt stock pistol grip forearm drive block Quote Link to post Share on other sites
Hunter308 6 Posted August 5, 2013 Report Share Posted August 5, 2013 A castle nut and and a locking plate. Just thought I'd mention them in case you hadn't thought about them. 1 Quote Link to post Share on other sites
Joe**Dirt 21 Posted August 5, 2013 Author Report Share Posted August 5, 2013 A castle nut and and a locking plate. Just thought I'd mention them in case you hadn't thought about them. Thanks! I lust added them to my list. Quote Link to post Share on other sites
Hunter308 6 Posted August 5, 2013 Report Share Posted August 5, 2013 You'll need a wrench, too for the castle nut; I bought this one and am very happy with it. Quote Link to post Share on other sites
Joe**Dirt 21 Posted August 5, 2013 Author Report Share Posted August 5, 2013 You'll need a wrench, too for the castle nut; I bought this one and am very happy with it. Thanks for the heads. I have an AR15 so I already have the tool. Quote Link to post Share on other sites
Joe**Dirt 21 Posted August 8, 2013 Author Report Share Posted August 8, 2013 Am I also going to need the buffer tube retainer & spring? Quote Link to post Share on other sites
cad_man 4 Posted August 8, 2013 Report Share Posted August 8, 2013 No. The MKA does not use a buffer & spring. Quote Link to post Share on other sites
Joe**Dirt 21 Posted August 8, 2013 Author Report Share Posted August 8, 2013 No. The MKA does not use a buffer & spring. I realize that. I was thinking in terms of it keeping the buffer tube straight. Quote Link to post Share on other sites
cad_man 4 Posted August 8, 2013 Report Share Posted August 8, 2013 (edited) There is no provision for the retainer & spring. It's only function it is to retain the buffer in the extension tube of ARs. The tab of an endplate aligns the buffer tube, and yes you will want to use one of those. Edited August 8, 2013 by cad_man 1 Quote Link to post Share on other sites
Joe**Dirt 21 Posted August 8, 2013 Author Report Share Posted August 8, 2013 Thanks Quote Link to post Share on other sites
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