ACF-L-MCX Spear is compatible with SIG Spear chambered in 7.62 x 51mm and 6.8mm x 51mm only, it will not work on 5.56mm and 7.62 x 39mm Spear LT.
The forward canting angle of the charging handle is snag prone, what looks like a hook also behaves like one. ACF's handles are low snag probable and don't have a forward canting angle by design. The proliferation of AR15/M16, and MCX charging handles with forward canting handles doesn't make such a design a standard. ACF-MCX and ACF-L-MCX are probably the only MCX charging handles without the upside down barbed arrow shape. If you prefer a forward canting angle, the factory SIG charging handle is what we recommend.
ACF-L-MCX is closely based on the AR15/M16 version of the original ACF-L. Like the factory SIG MCX charging handle, ACF-L-MCX has two latches.
Design objectives:
1. A stronger, more durable ambidextrous charging handle that can withstand repeated mortaring.
2. A better means of deflecting gas and debris from the shooter's face and eyes when shooting with a sound suppressor.
ACF-L-MCX design highlights:
1. The width of the T handle is slightly wider to better work with LPVOs.
2. We retained the gentle rearward sweeping slope of the M16 TDP CH T handle, and avoided a forward cant. A forward cant is snag prone, we also wanted the users to be able to let go of the latch without having to make a exaggerated motion to get his hand out of the way of the latch. In this, we again followed the original design. The forward canting angle is snag prone, what looks like a hook will behave like a hook. ACF does not have forwarding canting handles.
3. ACF-L-MCX is significantly taller/thicker than the SIG design. Both the front strap and the curved back strap of the ACF are aggressively serrated. The back strap's slight curve follows the curve of the user's thumb. The tall profile of ACF-L-MCX's T handle is designed to provide more surface area. While ACF-L-MCX's T handle is wider to better accommodate LPVO users, it retains the anti-snag features of all ACF charging handles.
4. A "constant motion" latch on either side of the T handle. The name derives from the feature where the latches don't come to a hard stop prematurely, but will instead continue to move into the ACF-L-MCX's T handle when mortared. When a user needs to mortar the weapon, no stress is placed on the latches. Though the roll pins we use are immensely strong, the latches and the ACF-L-MCX body are both aluminum. A design that allows the latch to hit a hard stop, or bottom out, invariably stresses the material around the pin holes. Imagine trying to slam a revolving door, it keeps rolling.
5. A taller and better gas deflection fence. ACF-L-MCX's fence is taller than the upper receiver, and is horse shoe shaped to conform to the area of the upper where it meets the charging handle.
6. ACF-L-MCX's T handle is immovable, and fixed in place like the M16 TDP CH design. Like the M16 TDP design, the fixed T handle is strong and has no moving parts.
Machined from 7075 aluminum, ACF-L-MCX is Type III hard coat anodized, and available in black and FDE.
Like all Forward Controls Design products, ACF--L-MCX is proudly designed and made in the USA.
U.S. Patent Nos. 7,900,546 and 7,240,600, under license.
NOTE:
ACF-L-MCX Spear is compatible only with SIG Spear chambered for 7.62 x 51mm and 6.8mm x 51mm only, it will not work on 5.56mm and 7.62 x 39mm Spear LT.
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