I decided to chronicle the parts needed to build your own 22lr upper reciever.
Parts list so far:
-Smith and Wesson M&P 15 sport upper receiver (no forward assist or ejectection port door)
–CMMG WASP 22LR m4 profile barrel 1:16 twist
–CMMG dedicated 22lr anti-jam charging handle
-A2 flash hider left over from Palmetto state armory build
–CMMG stainless steel 22lr conversion
these work perfect to block the barrel port … https://www.grainger.com/product/2ADR8?gclid=COfy19qjoNMCFQaOaQod4u0Obw&cm_mmc=PPC:GOOGLEPLAA-_-Power%20Transmission-_-Couplings%2C%20Collars%2C%20and%20Adapters-_-2ADR8&AL!2966!3!166591018017!!!g!104633823477!&s_kwcid=AL!2966!3!166591018017!!!g!104633823477!&ef_id=WLm3mgAAAGAHfzd5:20170413012744:s
OK. I would buy the bolt with the dedicated collar. So wouldn't the barrel just sit in the dedicated collar and fix in place with the ball detent on the collar. I would obviously need to get the custom barrel machined as the CMMG. Actually it might just be easier to buy the cmmg barrel with adapotor.
I'm getting a match 22 barrel from Border Barrels. Maybe I should give them a call to check. I assumed the collar mated the bolt to the barrel but it's my first build so still learning.
where are you planning on getting your barrel from? if you ar buying just a 22lr barrel it pretty much has to come with a barrel adapter. unless you get a .223 barrel, in which case you wold just use a conversion
Great thanks for the reply. I'm looking to build a 22 upper from scratch. I'm in the UK so I doubt my barrel will come with a barrel adaptor. I guess I need to buy a dedicated bolt from scratch rather than convert a conversion : )
as it sits now I have a dedicated 22 bolt in it. I originally purchased the conversion bolt. when I bought the 22lr barrel it came with the barrel adapter to turn the conversion bolt into a dedicated bolt. Just swap the chamber adapter for a barrel adapter. hopefully that makes sense. I think in the next video of the series I actually show the difference.
What made you go for the 22lr conversion bolt rather than getting a dedicated bolt? Is your barrel extension machined for an normal AR BCG?