Our individual components and the stock set are designed to fit the AR15 rifle with a standard A2 length buttstock and with a 12 inch hand guard that mounts between a triangular cup and the delta ring. Everything will fit with no modifications.
A1 Rifle
If your firearm has a standard A1 length buttstock then you will need to purchase a A2 buttstock spacer (Brownells item #430-000-455) inorder to properly mount our buttstock. The pistol grip and hand guard will fit with no modifications.
Carbine
The pistol grip fits directly. We are currently developing a six inch triangular style hand guard to fit this type of firearm. For the buttstock you will need to remove the collapsible stock and the receiver extension tube and replace these with the A2 rifle stock completion kit (Brownells item #080-000-554WB). Refer to the following youtube instructional video https://www.youtube.com/watch?v=Z7ulYJN6OCo