.17 HMR Full-Length Receiver Extension Spacer
- Nylon spacer used in A2/full-length receiver extensions when the lower receiver is used with a .17 HMR upper receiver assembly.
- This component fills the space left over in a full-length extension after installing the .17 HMR recoil cassette into it.
- The .17 HMR recoil cassette has an overall length designed for use in M4-type receiver extensions.
|Dimensions||2.5 × 1 × 1 in|