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Brownells

Ar-15 Hammer Drop Block - Brn Ar-15 Hammer Drop Block

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Drop-in Delrin

Block for AR-15 trigger tuning

Helps Provide

True feel of trigger movement

Shock-absorbing Design

Protects your thumb during hammer

Prevents Hammer

Impact against the magazine well

Helps Reduce

Risk of receiver damage and

$29.99
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SKU: 080953000

Overview

This drop-in block is designed for AR-15 trigger tuning, giving you a more accurate feel for trigger movement and pull weight while helping protect your thumb during hammer drops. It fits into the magazine well with the upper receiver open or removed, making it a practical bench tool for setup and adjustment work. The shock-absorbing Delrin construction is intended to keep the hammer from striking the magazine well wall, which can help reduce the risk of receiver damage and broken hammers. For shooters who spend time refining trigger feel, it offers a simple, purpose-built way to work more safely at the bench.

Why Hunters Choose the Brownells

Drop-in Delrin

Block supports trigger tuning without

Helps Prevent

Hammer impact against the magazine

Designed Help

Reduce the chance of expensive

Allows True

Feel of trigger movement and

Fits Into

The upper receiver open or

Key Features

  • Drop-in Delrin block for AR-15 trigger tuning
  • Helps provide a true feel of trigger movement and pull weight
  • Shock-absorbing design protects your thumb during hammer drops
  • Prevents hammer impact against the magazine well wall
  • Helps reduce risk of receiver damage and broken hammers
  • Fits in the magazine well with the upper receiver open or removed

Best Used For

  • AR-15 owners tuning triggers and wanting safer dry-fire hammer drops
  • Gunsmiths checking trigger movement and pull weight during bench work
  • Shooters protecting receivers while repeatedly testing hammer function
  • Users seeking a simple magazine-well block for trigger adjustment sessions

Specifications

Colorblack
Height2-1/8'' (5.4cm)
Length3'' (7.6cm)
MaterialDelrin

Pros

  • Drop-in Delrin block supports trigger tuning without risking your thumb
  • Helps prevent hammer impact against the magazine well wall
  • Designed to help reduce the chance of expensive receiver damage
  • Allows a true feel of trigger movement and pull weight
  • Fits into the magazine well with the upper receiver open or removed
  • Built to withstand thousands of hammer strikes

Considerations & Trade-offs

  • Designed for AR-15 trigger tuning, so its use is specialized rather than a general-purpose bench accessory.
  • It is a drop-in Delrin block, which means it protects the receiver during hammer drops but does not replace normal firearm handling precautions.
  • Fit is tied to the magazine well with the upper receiver open or removed, so setup depends on that specific configuration.
  • The product is focused on preventing hammer impact during tuning; it does not add any performance benefit beyond that function.

Suggested Comparisons

  • AR-15 trigger tuning tools
  • AR-15 armorer tools
  • firearm maintenance accessories
  • receiver protection tools

Suggested Accessories

  • AR-15 trigger tuning tool
  • Bench block
  • Gun vise
  • Armorer's mat

Frequently Asked Questions

What is the AR-15 Hammer Drop Block used for?

It is a drop-in block for AR-15 trigger tuning that lets you feel trigger movement and pull weight while helping protect the receiver and your thumb during hammer drops.

How does it protect the rifle during trigger work?

According to the product description, the block prevents the hammer from striking the wall of the magazine well, which helps avoid receiver damage and broken hammers.

Will it fit with the upper receiver closed?

No. The description says it fits into the magazine well with the upper receiver open or removed.

What material and color is the block?

The listed specifications say it is Delrin and black.

What are the listed dimensions?

The provided specs list it as 2-1/8 inches high and 3 inches long.