12-11-2011, 10:34 PM
Yes and no.
The lower is still a 5.56 pattern but contains the following additional parts.
1) Mag block pinned in place
2) Extended mag latch
3) Recoil cassette
To go back to shooting a Grendel you would have to remove/replace all these bits which is kind of a pain.
When we were getting into the design it was a question as to just how much we should compromise the function to make the changeover. It was a decision to make everything work well in preference to a drop in change over. The 17 HMR shoots so well that like most AR uppers it eventually demands to be a rifle.
The lower is still a 5.56 pattern but contains the following additional parts.
1) Mag block pinned in place
2) Extended mag latch
3) Recoil cassette
To go back to shooting a Grendel you would have to remove/replace all these bits which is kind of a pain.
When we were getting into the design it was a question as to just how much we should compromise the function to make the changeover. It was a decision to make everything work well in preference to a drop in change over. The 17 HMR shoots so well that like most AR uppers it eventually demands to be a rifle.