Originally Posted by
Bulzeye
Can you use the bolt from a piston AR in a DGI gun?
I know that a common problem with DGI ARs is that the gas key can shoot loose. I see that the piston ARs have that part machined into the bolt as a single piece, and are therefore much more durable to endure the stresses of repeated piston strikes. Can I buy a piston style one-piece bolt and use it in a DGI gun?
If your rifle is DGI, you need to stick to DGI parts. The piston ARs I've handled are absolutely not compatible in terms of the bolt carrier with the bolt carrier your DGI system requires.
If you swap your DGI bolt and bolt carrier with one from a piston AR, you're most likely going to find immediately that it won't fit. If it does, you're more likely going to have quite a mess to deal with once you fire the first round, which - more likely than not - has little hope of actually cycling the action.
Not a good idea to attempt something in defiance of engineering.