Here's where my long journey has basically finished. The last things I will add this month are polymer backup sights which I should have by 12/19. I do have the laser that is mounted on the bottom in front of the MagPul AFG2 sighted in to be 1.5" low at 25 feet. With luck, I will be able to get to a range to get it properly sighted in over this coming weekend.
Current parts breakdown is as follows:
- Smith & Wesson M&P 15 stripped lower receiver
- CMMG Lower Parts Kit
- MagPul polymer trigger guard
- Pearce Grips 1911 grip frame adaptor and low profile grips
- 'mil spec' sized six position buffer tube with Velcro loops cemented on
- Standard mass Carbine buffer
- Mark's Armory coated Carbine buffer spring
- 1.25" cane tip cemented onto the end of the buffer tube
- CAA Saddle with Velcro hooks cemented on
- Sling attachment secured to end plate
- Aero Precision stripped upper receiver
- Detroit Gun Works bolt carrier group (will get changed out for a better carrier but it works ok)
- Standard charging handle
- S&W M&P labeled 10" free float rail
- 11.5" 5.56 barrel (unmarked) with carbine length gas port
- ICE Arms Carbine gas tube
- Cut-down front sight base gas block (barrel drilled for the tapered pins on this, very sturdy)
- Standard A2 flash hider
- MagPul Angled Forward Grip model 2
- Green laser that runs on C123 batteries (extras stored in Saddle's battery tubes)
cuts', so I carefully expanded the barrel extension's cuts to meet the upper receiver's. This has greatly increased the feeding of 'dummy' rounds after the first as the tips are no longer getting hung up. I will know for sure after I get to shoot live rounds out of it as to whether or not I will still have failures to feed, a problem that occasionally cropped up with the previous upper receiver.
ICE Arms will be where I source my next bolt carrier from and quite probably my next barrel for a rifle build. Please check them out here via my affiliate link.
This build has always followed the answers I received back in July of 2012 from the ATF Tech Department Chief. Feel free to ask any questions on any part of my build.