Geissele Automatics was established in 2004 as a manufacturer of trigger mechanisms for the AR-15 rifle. Gesssele products quickly became the trigger of choice for M4 carbine based weapons by many U.S. Special Forces entities. Rely on Geissele when you expect superior performance, quality, and reliability.

The Geissele Reaction Block is designed to aid in the assembly of lower receivers. Once the armorer has installed the buffer tube, the lower receiver can then be slid into the Reaction Block at the 12, 3, 6 and 9 o'clock positions. This allows the armorer to rotate the lower receiver by 90° increments in the block simply by loosening the provided nylon screws, removing the lower receiver and sliding it back in at its desired orientation. The Reaction Block provides an ultra-stable platform for performing an array of lower receiver operations as well as making the installation of the buffer retainer nut quick and easy. This is all possible while keeping both hands of the armorer free to work, saving both time and frustration.

Features and Specifications:
Manufacturer Number: 10-169
AR-15/M4 Reaction Block
For AR-15/M4 pattern rifles
Faster and easier AR lower receiver assembly or disassembly
Lower can be attach at different angles (12, 3, 6, 9 o'clock) for better access to parts
Clams on to any Mil-Spec buffer tube
Material: Steel
Color: Black

Fits:
AR-15/M4 style rifles

Note: This product is new and being closed out; sold "As Is" and is not returnable to Cheaper Than Dirt. Please contact the manufacturer for warranty and assistance.