Lupo Posted June 24, 2006 Share Posted June 24, 2006 Many of you have been salivating over the titanium bolt handle for the M4 on the Brownell's website. And I don't blame you. The link is here . The problem is that this handle doesn't fit the M4. I spoke with Brownell's and the manufacturer, Progressive Machine and Tool. The maker says they never represented this part as fitting anything but the M1, and the label on the plastic bag containing the part does indeed confirm this. He said that Brownell's told him they thought a handle for the M1 would fit the M4. The Brownell's technical support guy disavowed any knowledge of the M4, but conceded that they may need to modify their website. As of Friday, June 23, this hasn't happened; so I'm here to inject a note of caution. Note that the picture of the handle on the Brownell's website doesn't really illustrate the handle accurately, as does that on the manufacturer's website and the picture shown below. There's a flat section that's supposed to keep the handle from rotating which is "missing" from the Brownell's photo. This picture shows the factory M4 handle next to the oversize titanium handle. First, let me say that the titanium handle is beautifully executed, and the manufacturer obviously knows how to create high-quality parts; it just doesn't fit my M4. The pin on this unit isn't long enough to engage the catch in the bolt assembly; as indicated in the photo, the length of the pin on the titanium unit is about 0.9 inches, whereas the pin on the factory handle inserts to about 1 inch to engage the catch inside the bolt. As you can see from the picture, the flat section on the titanium handle is on one side of the pin only, rather than both. This is presumably to allow the handle to reach the back of the slot in the receiver, but the side-effect is that, when forward, the handle could rotate during handling such that it would potentially collide with the receiver while firing (assuming the pin was long enough to engage the catch in the bolt). I'm not comfortable with this at all. Let's let the manufacturer and Brownell's work this confusion out. In the meantime, I suggest that you hold off on ordering this part for your M4 (as represented), since it won't fit. As for me, I'm going to turn off the flat on the lathe and make this into the first titanium handle that really does fit the M4... Quote Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.