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Pricey but great - Geissele AR15/M4 Reaction Block
by
Frank,
Verified Owner
from IL, United States
Written on January 31, 2021
If you plan on doing alot of builds this is worth every dollar. It makes castle nut torqueing and staking very easy. It also makes installing the pistol grip a breeze along with most of the lower parts.
Would Recommend:
Yes
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