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One of the best things about running a JK Armament 155 series can is how easy it is to change its personality, and the front cap is where a lot of that happens. The 155 Pro Flash Reducer End Cap is the flat, low-profile option in the lineup, and this version is bored for .30 caliber with the standard 1.375×24 thread pattern. It is the shortest cap JK makes, so if you want flash management without adding any length to your setup, this is the one to grab.
The face of the cap features three small concave channels that do double duty. They give the front of the suppressor a clean, machined look, and they help break up and disperse gases at the muzzle to take the edge off visible flash. It will not scrub flash as aggressively as JK's longer flash hider end cap, but as a flat cap it does a noticeably better job than a plain bore hole, all while keeping things trim. Being the Pro version, it is cut from 6AL-4V Grade 5 titanium, so you get real strength for centerfire rifle duty at right around one ounce. The black finish blends in with pretty much any modern rifle and suppressor setup.
Installation is about as painless as it gets. The built-in 1-1/2 inch wrench flats mean a standard wrench handles removal and installation, so swapping between a compensator cap, flash hider cap, or this flash reducer takes a minute at the bench. The .30 caliber bore covers your .308, 6.5 Creedmoor, .300 Blackout, and similar builds, and matching the bore to what you are shooting gets you the best sound performance out of the can. It pairs with JK 155 series suppressors and the 155LT Mega Comp.
JK Armament machines these here in the States and stands behind them with a lifetime guarantee, and their customer support has a strong reputation among suppressor owners. If your 155 series can is wearing a worn cap or you just want a lighter titanium front end, this is a simple upgrade that earns its spot.
It is built for JK Armament 155 series suppressors with the swappable front cap system, and it also works on the 155LT Mega Comp. The thread pattern is 1.375×24, which is the standard interface across the 155 lineup. It is not designed to mount directly to a bare barrel.
No. The cap has 1-1/2 inch wrench flats machined into it, so a common wrench is all it takes to remove your old cap and snug this one down. Most folks can swap caps in a minute or two at the bench.
The Flash Reducer is JK's shortest, flat-style cap, using three concave channels in the face to help disperse gases and cut down visible flash without adding length. The Flash Hider end cap is longer and reduces flash more dramatically. If keeping the can as compact as possible matters most, the Flash Reducer is the way to go.
You can, since the .30 caliber bore has plenty of clearance for smaller projectiles. That said, matching the bore size to your cartridge gives the best sound suppression, so a .22 cal cap will run quieter on a 5.56 rifle. The .30 cal version is the right match for .308, 6.5 Creedmoor, .300 Blackout, and similar rounds.
| UPC | 850038425234 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | JK155PROEC30 |
| Model |
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