unforgiven Posted March 30, 2022 Report Share Posted March 30, 2022 I have an Aero pistol lower and SB4 muzzle device is 5" from gas block (mid gas) 3" from edge of 12" handguard. I could take 3 1/2" take muzzle device to edge of handguard. Lower has Aero recoil system. How do I improve the recoil system? Quote Link to comment Share on other sites More sharing options...
shooterrex Posted March 30, 2022 Report Share Posted March 30, 2022 What caliber? If it is not a large frame a carbine spring and buffer in the sb4 tube should work. A 12 1/2" barrel should put the muzzle device at the end of the rail. Quote Link to comment Share on other sites More sharing options...
unforgiven Posted March 31, 2022 Author Report Share Posted March 31, 2022 (edited) 1 hour ago, shooterrex said: What caliber? If it is not a large frame a carbine spring and buffer in the sb4 tube should work. A 12 1/2" barrel should put the muzzle device at the end of the rail. .308 just cutting down a 16" with mid gas that I know runs. I figured around 13" finished Edited March 31, 2022 by unforgiven Quote Link to comment Share on other sites More sharing options...
shooterrex Posted March 31, 2022 Report Share Posted March 31, 2022 I put my pistol brace on the Armalite carbine set up on my 12.5" 308 Quote Link to comment Share on other sites More sharing options...
shooterrex Posted March 31, 2022 Report Share Posted March 31, 2022 Just now, shooterrex said: I put my pistol brace on the Armalite carbine set up on my 12.5" 308. Both of them. But I'm getting ready to pin and weld a long muzzle brake to one and make it a rifle. Quote Link to comment Share on other sites More sharing options...
unforgiven Posted March 31, 2022 Author Report Share Posted March 31, 2022 21 minutes ago, shooterrex said: I put my pistol brace on the Armalite carbine set up on my 12.5" 308 Carbine or mid gas? Do you run a suppressor ? Quote Link to comment Share on other sites More sharing options...
sketch Posted March 31, 2022 Report Share Posted March 31, 2022 Adjustable gas suppressed. Start wtfo.. I drilled my port to .093 from .063. Quote Link to comment Share on other sites More sharing options...
98Z5V Posted March 31, 2022 Report Share Posted March 31, 2022 (edited) Rene, here's my 13.5" barrel in a 12" handguard. Armalite AR-10 Carbine gas - which is Midlength-ish. Plus 3/16". Edited March 31, 2022 by 98Z5V Quote Link to comment Share on other sites More sharing options...
unforgiven Posted March 31, 2022 Author Report Share Posted March 31, 2022 Now to find a AR10 carbide kit. Quote Link to comment Share on other sites More sharing options...
98Z5V Posted March 31, 2022 Report Share Posted March 31, 2022 1 hour ago, unforgiven said: Now to find a AR10 carbide kit. Won't fit inside your receiver extension, brother. Need a heavy buffer that's 2.500" long. KAK has that. Sprinco Orange spring will do it, too. Quote Link to comment Share on other sites More sharing options...
sketch Posted March 31, 2022 Report Share Posted March 31, 2022 25 minutes ago, 98Z5V said: Won't fit inside your receiver extension, brother. Need a heavy buffer that's 2.500" long. KAK has that. Sprinco Orange spring will do it, too. Sb4 has a 7" ID Quote Link to comment Share on other sites More sharing options...
98Z5V Posted March 31, 2022 Report Share Posted March 31, 2022 15 minutes ago, sketch said: Sb4 has a 7" ID Exactly. Quote Link to comment Share on other sites More sharing options...
shooterrex Posted March 31, 2022 Report Share Posted March 31, 2022 My gas tube was like 11 1/8" custom made. Those were the sig barrels cdnn had. I used the entire Armalite carbine kit not just the spring and buffer. No I don't own any suppressors. Quote Link to comment Share on other sites More sharing options...
unforgiven Posted March 31, 2022 Author Report Share Posted March 31, 2022 Thanks guys 🍻🍻🍻 Quote Link to comment Share on other sites More sharing options...
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