Alexander upper receiver ar15.17hmr 18" s/s fluted w/kit Other Features: Fits standard ar-15 lowers, 1/2-28" threades stainless fluted barrel w/a2 flash hider,aluminum m-lok handgaurd ,2-10rd mags includes.17hmr conversion kit contains recoil cassette, magazine well insert, and magazine catch to fit most standard ar-15 lowers
Specifications:
| Barrel Material | Steel |
| Caliber | .17hmr |
| Rate Of Twist | 1:10" |
| Barrel Finish | Stainless |
| Barrel Length In Inches | 18.00 |
| Dimension | 4.55 X 9.90 X 37.60 |
| Ar-15 Accessory | Y |
