The DUTY CUT + Impulse Porting

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The Duty Cut Package is a no frills, no BS, upgrade package for your Glock handgun, and is now available as a bundle with our Impulse Porting System.


Standard features include

-Your choice of Optic Cut (including iron sight configuration)

-Enhanced Rear Serrations

-Factory roll marks removed

-Aggressive Angled Front Serrations (Vertical serrations will be cut on factory FS models such as the 43X or 48)

-Sawtooth Top Serrations

-Edge Chamfers

-Impulse Porting System


Maple Leaf Firearm's Impulse Porting System features precision 5-axis machined ports through the top edges of the slide, machined at a 30 degree offset on each side of the barrel center line to keep the shooter's sight picture clear of muzzle blast. The matching barrel machining is engineered to focus 18 individual high pressure jets of gas through the windows in the slide. This system is designed specifically to maintain the absolute reliability required of a defensive handgun, all while giving shooter flat-shooting performance. These size and spacing of these ports is designed to minimize the typical increased visual flash signature commonly found on other ported barrels.


Muzzle Velocity Data (Collected with Garmin Xero with accuracy +/- 5 fps)

Test Firearm: Glock 19Gen5 - Stock (non-Ported) OEM 19Gen5 Barrel vs OEM 19Gen5 Barrel with Maple Leaf Impulse Porting

Test Ammunition (Average Muzzle Velocity over 10 rounds)

 - Blazer 115gr / Avg MV Stock Barrel: 1091.9 fps / Avg MV Impulse Ported Barrel: 1073.1 fps (Loss of 18.8 fps)

 - Magtech 115gr / Avg MV Stock Barrel: 1149.4 fps / Avg MV Impulse Ported Barrel: 1128.3 fps (Loss of 21.0 fps)

 - TulAmmo 115gr / Avg MV Stock Barrel: 1143.9 fps / Avg MV Impulse Ported Barrel: 1124.3 fps (Loss of 19.6 fps)

 - Blazer 124gr / Avg MV Stock Barrel: 1109.1 fps / Avg MV Impulse Ported Barrel: 1087.1 fps (Loss of 22.0 fps)

 - Armscor 147gr / Avg MV Stock Barrel: 957.1 fps / Avg MV Impulse Barrel: 934.20 fps (Loss of 22.9 fps)

 - Speer GDHP 124gr+P / Avg MV Stock Barrel: 1177.5 fps / Avg MV Impulse Barrel: 1146.1 fps (Loss of 31.3 fps)