No gunsmithing required to attach this height-adjustable,
machined steel base to AR-15 and other heavy-barrel, match rifles.
Just clamp on the muzzle and adjust the riser block to the correct
height for your rear sight. Base accepts Redfield and other similar
target globe assemblies.
SPECS: Steel, black, matte finish. Base - 1" (2.5cm) long. Fits
.812" (20mm), .750" (19mm), .732" (18.6mm) (Colt factory Flattop
competition) and .922" (23.4mm) barrels. 1.25" (3.2cm) height
from center of barrel to top of base. Riser adjusts 1" (2.5cm) for
height.
Catalog page 59, 270