Daily Deal: Eylar 5-Pistol Hard Case ~~$99.99~~ $69.99 - Get Yours!

AR-15/M16 RECEIVER SHIMS Reviews & Ratings

Tempered stainless steel shims reduce play between receiver halves for a tighter, smoother-functioning rifle. Helps restore accuracy and reduce noise in older rifles. Upper/Lower shims fit on the pivot pin to reduce side-to-side play between the upper and lower receiver.

SPECS: Stainless steel, heat-hardened. Pak of 10.

See all of our AR15s and AR15 parts here.

View Product

Write a review

3 Stars

Reviews Summary

These AR-15/M16 receiver shims effectively address upper-to-lower receiver play, providing a solid feel for rifles. However, many users find the price point excessive for the product's simplicity and would prefer varied thicknesses for better customization. Installation can be challenging, yet the shims are praised for their effectiveness once properly fitted.

What Reviewers Are Saying

Product Effectiveness

70%

Many reviewers agree that these shims successfully eliminate wobble between the upper and lower receivers, enhancing the overall feel and stability of the rifle. This theme resonates with about 70% of the reviewers, indicating strong endorsement for the shims' functionality.

Installation Difficulties

65%

A significant portion of users reported challenges during the installation process, particularly due to the lack of varying thicknesses. Many found it hard to align and fit the shims correctly, leading to frustration. This theme is highlighted by 65% of the reviewers.

Price Concerns

60%

Customers consistently express disappointment regarding the pricing of the shims, often considering them overpriced for what they offer. This sentiment is prevalent in 60% of the reviews, indicating a clear concern about value for money.

Need for Variety

50%

Several reviewers noted the absence of different shim thicknesses as a major drawback, which could have tailored the solution better to various needs. Nearly 50% of respondents felt that a range of sizes would improve product usability and satisfaction.

Overall Recommendations

55%

Despite the challenges and pricing issues, many users recommend these shims for resolving receiver gaps, often suggesting they work well when combined with other products like the Accu-Wedge. This recommendation is echoed by about 55% of reviewers, underlining a recognition of the product's potential.

Sort by Filter by rating

Not a fan

This is not a workable solution for receiver slop in my opinion. It is easy enough to install a single shim, but when stacking multiple shims at once is nearly impossible to close the pivot pin. (In my case, a single shim did not produce a noticeable improvement). If one shim just happens to be the goldilocks size to make your receiver fit tight then great. Otherwise, this seems like a massive waste of time and money. The kit is hugely over-priced in my opinion. This should be a $10 or $20 item (e.g. $1-2 per shim, not $3.50 each). Major ripoff for something that does not really deliver on function. Save your money and buy lower receivers with tensioning screws instead (e.g. Aero Precision, Mega, Ballistic Advantage, or similar). Tensioning screws solve the receiver-slop problem the best in my opinion.

by MIKE M. on May 16, 2025

Verified Purchase

Was this review helpful? 0

Not easy to use

I found these shims difficult to install. Because they do not come in varying thickness, I required more than one. However, I could only get one easily installed. There was still enough play that I wanted to add another, but I needed a thinner one and could not get a second installed. Furthermore, they are a pain to get lined up. Don't get me wrong, it's doable, but I wrecked a couple of them trying to get it lined up correctly. I returned the item because it ended up not being helpful. Most shim kits come with various thickness shim disks. At this price point, I was shocked to find these were just 10 of the same.