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$ 20.95

This drop-in block will work with or without the upper receiver attached. Protects the hammer from striking the wall of the magazine well and the bolt release while the receivers are separated for purposes of trigger adjustments.

The block should be inserted from the bottom of the mag well. 

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1 review
Great tool!
Review star icon Review star icon Review star icon Review star icon Review star icon Jan 31, 2016
This durable delrin block, made by Schuster is perfect for tuning an adjustable trigger. I use it to practice trigger control and feel to make my shooting times more productive. Worth every penny!

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