AR-15/M16 UPPER RECEIVER ACTION BLOCK Reviews & Ratings

AR-15/M16 UPPER RECEIVER ACTION BLOCK

Heavy-duty blocks allow you to firmly clamp AR-15/M16 receiver halves in a vise without risk of crushing, twisting, or otherwise distorting them when applying vise pressure or torquing the barrel nut. Keeps your rifle secure for safe, effective cleaning, assembly, and repair. High pressure, solvent resistant, structural Rynite block and insert surround the entire upper receiver and support it inside and out to make rebarreling the AR-15/M16 an easy, one-man job. Lets you firmly secure a mil-spec carry handle receiver or mil-spec flattop receiver in a large bench vise for barrel removal/installation. Torque generated while tightening the barrel nut is transmitted to the block and insert, not the receiver. Minimizes the possibility of damage to the barrel detent pin and receiver detent notch. Holds securely without marring the finish.

DO NOT USE ON BILLET UPPERS OR LEFT HAND UPPERS, OR DAMAGE TO THE UPPER CAN RESULT.

SPECIFICATIONS:

Material: Injection-Molded Rynite
Color: Black
Fits: A1, A2 and Standard Flattop Receivers
Block:
- Thickness: 2-1/2"
- Width: 3-1/2"
- Height: 4-1/2"
Insert:
- Length: 8"
- Diameter: 1"
Torque Tested to 200 ft. lbs

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Reviews Summary

Overall, the AR-15/M16 Upper Receiver Action Block receives mixed reviews. While many users praise its sturdy build and ease of use, some report fitment issues with certain brands. Overall, it's considered an essential tool for DIY modifications, though quality control could be improved to ensure compatibility across more receiver types.

What Reviewers Are Saying

Product Fit

40%

Several reviewers express concerns regarding the fit of the action block on various upper receivers, particularly noting issues with non-milspec brands like DPMS and others. While some found the snug fit beneficial, others had to customize or modify the block for better compatibility, indicating a variance in quality control.

Ease of Use

65%

Many users commend the action block for its ease of use, noting that it securely holds the upper receiver in place during assembly or maintenance tasks. This feature is highlighted as a major advantage, making barrel changes and other modifications straightforward and manageable for DIY enthusiasts.

Quality and Durability

50%

The build quality of the action block is generally seen as solid and durable, with several reviews highlighting its non-marring material that protects the finish of the upper receiver. However, there are mentions of variability, with some users dissatisfied with the quality control associated with their specific units.

Essential Tool

70%

Numerous reviews categorize this action block as an essential tool for anyone working on AR-15s or M-16s. Its utility is well-recognized among DIY rifle owners, as it helps to prevent damage to receivers and simplifies tasks like installing barrels or handguards.

Price Value

60%

Reviewers frequently comment on the competitive pricing of the action block, considering it a great value for the features and reliability it offers. Many believe it is worth the investment for the quality of service it provides during firearm maintenance.

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Good but not Great

By all means everyone that does any type of work on their own rifles should have a receiver action block. They are without a doubt the most handy tool there is. This block, however, closes from the top down over the upper receiver. Using any type of non-standard uppper receiver is not possible because the block will not close around the protruding metal. I have recently purchased a Bushmaster Receiver Block that closes from the bottom of the upper receiver. This way if you have optics already mounted or have an upper with a high rail - it does not cause any problems. Since the bottom of the receivers will all be the same so that they can mate with the mil-spec lower receiver - you will not have any issue at all. I would not recommend this particular block to a friend though ... I would recommend the Bushmaster.