| Crosman Model 451 | |
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Colt 1911 A1 (.45
ACP) |
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Info: Manufacturer/Model: Crosman Model 451 (Military 45 Auto) Replica Of: Colt 1911 A1 (.45 ACP) Made In: USA Caliber/Ammunition/Feed: 22, lead pellets, 6-shot rotary magazine Air Source: CO2, 12 g Powerlet Accessories: None Recommended Pellet or BB: H&N Match-Kugeln (13.4 gr) Weight (lb)/Length (in): 2.8, 9.0 Body Material/Finish/Grips: metal, black, plastic Barrel Length (in)/Material/Rifled: 4.75, steel, yes Trigger Action: SA Trigger Pull (lbs)/Adjustable: 6.0 (SA), no Sights (front/rear): fixed, fully adjustable Velocity (fps): not specified Sound Level (dB): 99 Thickness of Pellet Holder (in): 0.261 Manufactured Dates: 1969-70 Condition/Manual/Box: 70%, yes (copy), no Serial Number: 000460
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Comments:
This is a true
semi-automatic from the Golden Decade of Crosman CO2
pistol production. Concurrently produced with the Model 451 were
the 600, Mark I & II, 38C, 38T, and the SA-6. The Model 451,
marked as the Military 45 Auto, is the rarest of all the Crosman
CO2
pistols produced during this period. It was manufactured during part of
1969 and 1970. This complex design used an unusual horizontally
rotating 6-shot magazine. The first shot requires cocking the
hammer by hand. Gas pressure pushes the slide back against the
hammer, cocking it after each shot. Since some of the gas is
used to cycle the slide, the 451 doesn't get as many shots from
a 12 gram CO2
bulb as other models do. This gun gets about 30 good shots from
each cylinder. This pistol is fun to shoot,
but loading pellets takes a lot of patience. It is still the
only semi-automatic, true single-action, CO2-powered,
blow-back pellet pistol ever made. The Model 451 along with the Model
600 represent, in my opinion, the high water mark in Crosman airgun
innovation and engineering. Pyramyd Air Report on the Crosman Model 451. Performance: Measurements were made on 11/19/06 at a temperature of 68 ºF and 14' elevation. A ten shot string was fired from a bench rest at 15' using H&N Match Kugeln pellets (13.4 gr). The highest velocity measured was 322 fps, the lowest was 287 fps (average of the 10-shot string was 307 fps). A six shot string fired with open sights grouped at 0.70". Click the thumbnail below to see a larger image. Click here for a description of the measurement methods.
Test Firing Record:
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Right Profile: |
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Front View: |
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Right Side Markings: |
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Left Side Markings: |
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Rear View: This pistol has a hammer safety. To engage the safety, pull the hammer back about 1/8" until the first "click" is heard. To fire the first shot after loading pellets, the hammer must be cocked manually. After the first shot, the hammer is cocked by the blow-back action of the operating slide. |
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Loading Pellets: To load pellets, first engage the safety. Push the magazine cover button forward, which pushes the operating slide up. This allows the magazine to be rotated using the knurled edge. Pellets are loaded into the magazine skirt first. Be sure to push the magazine cover button back after loading in order to cover the chambers of the magazine and to lower the operating slide. |
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Loading CO2: Although the threaded knob at the bottom of the grip is not very attractive, this gun has one of the most effective cartridge piercing mechanisms of any CO2 gun I've seen. Unscrewing the knob lowers the whole bottom plate of the grip and releases the cylinder. Tightening the knob pushed the cylinder against the piercing pin. The right hand grip will not stay on unless a CO2 cylinder is inserted. |
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