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US 10,767,954 B1Granted
Barrel harmonizing assembly and method
OwnerCharles M. Howardinventor
Life of this patent
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Abstract
A barrel harmonizing assembly and method for a firearm in which a cylindrical harmonizer sleeve, as well as a pair of tuning nuts which are threadedly positioned on the harmonizer sleeve for longitudinal tuning movement, are positioned around the barrel, rather than projecting from the forward end of the barrel, in order to provide improved tuning and to permit the use, as part of the assembly, of a flash hider, a recoil compensator, a suppressor or other device on the end of the barrel to further improve the accuracy of the barrel and/or provide other benefits.
Claims20
A harmonizing assembly comprising:
- a cylindrical sleeve having an internal passageway extending therethrough configured to receive, and to position the cylindrical sleeve around an exterior of, a longitudinal portion of a barrel of a firearm, the cylindrical sleeve having threads around at least a portion of a longitudinal exterior of the cylindrical sleeve;
- a first tuning nut which is threadedly received around, and is longitudinally repositionable along, the longitudinal exterior of the cylindrical sleeve;
- a second tuning nut which is threadedly received around, and is longitudinally repositionable along, the longitudinal exterior of the cylindrical sleeve, the second tuning nut being threadedly tightenable against the first tuning nut;
- and
- an inwardly extending radial shoulder at a forward longitudinal end of the cylindrical sleeve, the inwardly extending radial shoulder being configured to deliver an externally threaded forward end segment of the barrel through the inwardly extending radial shoulder at the forward longitudinal end of the cylindrical sleeve such that the inwardly extending radial shoulder is retained by an exterior shoulder of the barrel, wherein the externally threaded forward end segment of the barrel has a reduced outer diameter and the exterior shoulder of the barrel is located at a reward longitudinal end of the externally threaded forward end segment of the barrel.
2 more elements
An assembly for a firearm comprising:
- a barrel of a firearm;
- a cylindrical harmonizer sleeve positioned around an exterior of a longitudinal portion of the barrel, the cylindrical harmonizer sleeve having threads around at least a portion of a longitudinal exterior of the cylindrical harmonizer sleeve;
- a first tuning nut which is threadedly received around, and is longitudinally repositionable along, the longitudinal exterior of the cylindrical harmonizer sleeve;
- a second tuning nut which is threadedly received around, and is longitudinally repositionable along, the longitudinal exterior of the cylindrical sleeve, the second tuning nut being threadedly tightenable against the first tuning nut;
- and
- the cylindrical harmonizer sleeve having an inwardly extending radial shoulder at a forward longitudinal end of the cylindrical harmonizer sleeve through which an externally threaded forward end segment of the barrel projects, wherein the inwardly extending radial shoulder at the forward longitudinal end of the cylindrical harmonizer sleeve is retained by an exterior shoulder of the barrel, the externally threaded forward end segment of the barrel has a reduced outer diameter, and the exterior shoulder of the barrel is located at a reward longitudinal end of the externally threaded forward end segment of the barrel.
3 more elements
A method of harmonizing a barrel of a firearm comprising the steps of:
- a) placing a harmonizing sleeve assembly on the barrel comprising
- a cylindrical sleeve which is positioned around an exterior of a longitudinal portion of the barrel, the cylindrical sleeve having threads around at least a portion of a longitudinal exterior of the cylindrical sleeve and the cylindrical sleeve having an inwardly extending radial shoulder at a forward longitudinal end of the cylindrical sleeve through which an externally threaded forward end segment of the barrel projects, the externally threaded forward end segment of the barrel having a reduced outer diameter,
- a first tuning nut which is threadedly positioned around the longitudinal exterior of the cylindrical sleeve at a longitudinal tuning location, and
- a second tuning nut which is threadedly positioned around the longitudinal exterior of the cylindrical sleeve and is tightened against the first tuning nut at the longitudinal tuning location;
- b) retaining the harmonizing sleeve assembly on the barrel by threadedly tightening a threaded retainer on the externally threaded forward end segment of the barrel such that the inwardly extending radial shoulder at the forward longitudinal end of the cylindrical sleeve is held in fixed position between the threaded retainer and an exterior shoulder of the barrel which is located at a reward longitudinal end of the externally threaded forward end segment of the barrel;
- c) tiring a plurality of shots from the barrel to determine a grouping of the shots;
- and
- d) moving the first and second tuning nuts longitudinally to a different longitudinal tuning location around the exterior of the cylindrical sleeve to obtain a tighter grouping of shots.
5 more elements
Dependencies are inferred from the claim text.