Fall Build Fest Continues - 15% OFF GUN PARTS THIS WEEK
Use Code: PARTS15

Fall Build Fest Continues - 15% OFF GUN PARTS THIS WEEK
Use Code: PARTS15

AR-15/M16 9MM DROP-IN CONVERSION BLOCKS

AR-15/M16 9MM DROP-IN CONVERSION BLOCKS Reviews & Ratings

One-piece, machined aluminum block converts AR-15 lower receiver to 9mm. Compatible with all, Colt-type, 9mm upper receivers, the feed ramp is cut for reliable feeding with all types of ammo, including hollow point and frangible ball. Roller retention device holds block securely in receiver, prevents accidental release. Hardened steel ejector, feed ramp and bolt hold open give long service life; last-round-hold-open feature on bottom-loading model works when used with Colt magazines. Also works with modified UZI magazines but last-round-hold-open will not function. No receiver modification required. Top-Loading Block installs from the top of the lower receiver and Bottom-Loading Block installs from the bottom of the lower receiver. SPECS: Aluminum, black, matte finish.

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Reviews Summary
Overall, customers rave about the AR-15/M16 9MM Conversion Blocks, highlighting their excellent fit, build quality, and reliable performance. While some users faced initial fitting challenges, many found it easy to install, and compatibility with various magazines was frequently praised. However, a few noted potential issues with specific lowers requiring additional adjustments.
What Reviewers Are Saying
Product Quality
85%
Many reviewers express satisfaction with the build quality and materials of the conversion blocks, praising their snug fit and high standards of manufacturing. This theme resonates strongly among users who have tested the product extensively, confirming its reliability in various configurations.
Ease of Installation
75%
Reviewers commonly describe the installation process as straightforward, with many appreciating its drop-in capability. However, some encountered fitting issues with specific lowers, suggesting that users should be prepared for minor adjustments in certain cases.
Compatibility with Magazines
60%
The conversion blocks are highlighted for their compatibility with a variety of magazine brands, especially Metalform and Colt. However, some users reported needing to modify magazine catches for optimal performance, indicating a slight learning curve depending on the user's setup.
Reliability and Performance
70%
Users commend the conversion blocks for delivering flawless operation across numerous rounds, even with various types of ammunition. The consensus is that once properly installed, the product performs as intended without malfunctioning.
Adjustments Required
50%
A few reviewers encountered issues that required fitting and adjustments before achieving a perfect setup. This theme highlights the variability in lower receiver specifications and user skills, suggesting that some will need to be comfortable with minor modifications.
1
Did not fit
Would not fit inside 17 Design brand lower without significant fitting and effort.